About Q-slope
Q-slope is an empirical method for assessing the stability of rock slopes (slope stability). The Q-slope method provides a simple yet effective empirical means of assessing the stability of excavated rock slopes in the...
Q-slope is an empirical method for assessing the stability of rock slopes (slope stability).
The Q-slope method provides a simple yet effective empirical means of assessing the stability of excavated rock slopes in the field. Intended for use in reinforcement-free road or rail cuttings or individual benches in open cast mines, Q-slope allows geotechnical engineers to make potential adjustments to slope angles as rock mass conditions become apparent during construction. Through case studies in South-East Asia, Australia, Central America and Europe, a simple correlation between Q-slope and long-term stable slopes was established. Q-slope is designed such that it suggests stable, maintenance-free bench-face slope angles of for instance 40-45º, 60-65º and 80-85º with respective Q-slope values of approximately 0.1, 1.0 and 10. Q-slope was developed by supplementing the Q-system which has been extensively used for characterizing rock exposures, drill-core, and tunnels under construction for the last 40 years. The Q’ parameters (RQD, Jn, Ja & Jr) remain unchanged in Q-slope. A new method of Jr/Ja ratios for both sides of potential wedges, using relative orientation weightings is presented. The term Jw, which is now termed Jwice, takes into account long-term exposure to various climatic and environmental conditions (e.g. intense erosive rainfall, ice-wedging effects). Slope relevant SRF categories for slope surface conditions, stress-strength ratios and major discontinuities such as faults, weakness zones or joint swarms have also been incorporated.
For user manual and further information visit www.geckogeotech.com
Previous Versions
Here you can find the changelog of Q-slope since it was posted on our website on 2020-09-04 09:21:21.
The latest version is 7.0 and it was updated on 2024-03-25 20:22:24. See below the changes in each version.
Q-slope version 7.0
Updated At: 2018-10-28
Changes: Mandatory GooglePlay request update of app to target at least Android 8.0 (API level 26)
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